A buffer is prepared using acetic acid, CH3COOH, (a weak acid, pK = 4.75) and sodium acetate, CH,COONA (which provides acetate ions, the conjugate base), according to the following proportions: Volume of CH3COOH(aq): 109.0 mL Concentration of CH3COOH(aq): 1.281 M Volume of CH3COONA(aq): 142.0 mL Concentration of CH3COONA(ag): 1.043 M A 50 mL sample of this original buffer is transferred to a clean and dry beaker, to this solution 150 mL of deionized water is added. Calculate the pH of this new, diluted buffer solution. O 4.75 4.72 4.78 4.84 O 4.66

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A buffer is prepared using acetic acid, CH3COOH, (a weak acid, pKa = 4.75) and sodium acetate, CH3COONA (which provides acetate ions, the conjugate
base), according to the following proportions:
Volume of CH3COOH(aq): 109.0 mL
Concentration of CH3COOH(aq): 1.281 M
Volume of CH3COONA(aq): 142.0 mL
Concentration of CH3COONA(aq): 1.043 M
A 50 mL sample of this original buffer is transferred to a clean and dry beaker, to this solution 150 mL
deionized water is added.
Calculate the pH of this new, diluted buffer solution.
4.75
4.72
4.78
4.84
4.66
Transcribed Image Text:A buffer is prepared using acetic acid, CH3COOH, (a weak acid, pKa = 4.75) and sodium acetate, CH3COONA (which provides acetate ions, the conjugate base), according to the following proportions: Volume of CH3COOH(aq): 109.0 mL Concentration of CH3COOH(aq): 1.281 M Volume of CH3COONA(aq): 142.0 mL Concentration of CH3COONA(aq): 1.043 M A 50 mL sample of this original buffer is transferred to a clean and dry beaker, to this solution 150 mL deionized water is added. Calculate the pH of this new, diluted buffer solution. 4.75 4.72 4.78 4.84 4.66
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